Single band raster layer symbology (Sextante)

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Introduction

It is possible to change raster symbology on a single band raster image loaded via Sextante Imagery.

OpenJUMP 1.8

Click on menu Raster>Raster Color Editor to open a dialog that allows to set a color model for the layer. The dialog is quite intuitive. The first combo box allows to choose the color ramp to apply. On the lowe part, the minimum and maximum cell values fileds (from value -> To value) allow to set the minimum and maximum values of the color range. The values displayed by default are the lower and upper values of the raster. Other values (outside the chosen range) will be set to black color.
Rastercolor 00.png

OpenJUMP since version 4403

Newer versions of OpenJUMP allow to open a dialog for changing raster color model via Sextante Layer popup menu, Change Raster Image properties.
Rastercolor 01.png


The first combo box allows to choose the color ramp to apply. On the lowe part, the minimum and maximum cell values fileds (from value -> To value) allow to set the minimum and maximum values of the color range. The values displayed by default are the lower and upper values of the raster.
Rastercolor 02.png


Modifing values on (from value -> To value) allows to define an appropriate symbology to the range of cell values of interest. Other values (outside the chosen range) will be set to a light grey color.
Rastercolor 02b.png


The option Set values outside the range to transparent allows to set those values which fails outside the min/max range to transparent. In the figure below all the values 700<x>1500 are set to transparent.
Rastercolor 04.png


The option Invert colors allows to invert the color ramp applied to the raster
Rastercolor 03.png